Home / 99,647,928.30-149,471,892.45-85,777,318.20

Finding the Fourth Proportional to 99,647,928.30, 149,471,892.45 and 85,777,318.20

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Solution

The fourth proportional to 99,647,928.30, 149,471,892.45 and 85,777,318.20 is: 128,665,977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,647,928.30 : 149,471,892.45 = 85,777,318.20 : x
  2. Step 2: Convert to fraction form
    99,647,928.30/149,471,892.45 = 85,777,318.20/x
  3. Step 3: Cross multiply
    99,647,928.30x = 149,471,892.45 × 85,777,318.20
  4. Step 4: Simplify right side
    99,647,928.30x = 12,821,298,080,639,828
  5. Step 5: Solve for x
    x = 12,821,298,080,639,828/99,647,928.30
  6. Step 6: Final answer
    x = 128,665,977.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.